ABSTRACT
Objectives
To evaluate the clinical PK/PD of PTH(1-34) delivered by a novel transdermal drug-coated microneedle patch system (ZP-PTH) for the treatment of osteoporosis.
Methods
Phase 1 PK studies evaluated the effect of site of administration, patch wear time and dose in normal volunteers, ages 40–85 yrs. Phase 2 was conducted in post-menopausal women with osteoporosis to determine the patch dose response compared to placebo patch and FORTEO® injection.
Results
Phase 1 ZP-PTH patch delivery demonstrated a rapid PTH plasma pulse profile with Tmax 3 times shorter and apparent T1/2 2 times shorter than FORTEO®. In Phase 2, ZP-PTH 20, 30 and 40 µg doses showed a proportional increase in plasma PTH AUC. Inter-subject and intra-subject AUC variability was similar for all patch doses and comparable to injection. All patch doses produced a significant increase in spine bone mineral density. Unexpectedly, ZP-PTH also produced an early increase in hip bone mineral density, an effect not observed with the injection.
Conclusions
These studies suggest that this novel ZP-PTH patch system can deliver a consistent and therapeutically relevant PTH PK profile. Based on encouraging Phase 2 safety and efficacy data, the program is advancing into a pivotal Phase 3 clinical study.
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ACKNOWLEDGEMENTS
The authors would like to thank Mary Southam, Asha Ramdas, Stephen Hwang, Michel Cormier and Creag Trautman for their valuable insights and contributions to this product development over the past several years.
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Daddona, P.E., Matriano, J.A., Mandema, J. et al. Parathyroid Hormone (1-34)-Coated Microneedle Patch System: Clinical Pharmacokinetics and Pharmacodynamics for Treatment of Osteoporosis. Pharm Res 28, 159–165 (2011). https://doi.org/10.1007/s11095-010-0192-9
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DOI: https://doi.org/10.1007/s11095-010-0192-9